Drill press guard



June-4, 1940. l H, E, T'AUTZ 2,202,878

DRILL PRESS GUARD Filed June 1, 1937 FIG, j;

FIG. 4

OI .5 59 JZ1 15 y FIG 6 Wl NESSES 255 Pian-tea 'June '4, 11940' Herbert E.

The Delta Manufacturing Company,

Tautz, Milwaukee,- Wis., assgnor to MilwaukeeLWis., a corporation of Wisconsin Application June 1, 1937, SerialNo.

e claims.- (ci. 74P-61u l pulley is supported on an outer bearing above the.

pulley.

It is sometimes necessary or desirable to guard the belt drive of the drill press, and it is an object of .the present invention to struction for enclosing and adequately protecting the belt drive.

Another object of the invention is to provideV guard means capable of easy mounting and disn mounting to permit quick and convenient shifting and replacement of the belt.

A further object is to` provide belt-guarding means which will not interfere with the slidable mounting of the spindle-carrying head on its g columnar support. I

'Ihe invention further consists in the several features hereinafter described and claimed.

One embodiment of the invention is shown in the accompanying drawing, wherein Fig. 1 is a side elevation of a drill press equipped with guard means of the invention; Fig. 2 is a front elevation of the drill press; Fig. 3 is a top plan view of the drill press; Fig. 4 is a sectional elevation taken generally along the line 4-4 of Fig. 3;

Fig. 5 is a sectional view taken generally along the line 5-5 of Fig. 1; Fig. 6 is a sectional elevation taken generally along the line 6--6 of Fig. 1, and

Fig. 'I is a detail bottom view of one of the guards. A

In the drawing, I0 designates a drill press head including a clamping cap II by which the head is adjustably mounted on a columnar support I2. A vertical quill I3 is slidable in the head and has journalled therein a downwardly projecting spindle I4 adapted to carry thereon a drill or other tool, not shown. A pulley shaft I5 coaxial with the spindle has a splined or other suitable driving connection with a sleeve I6 forming an upper extension of the spindle. The pulley shaft I5 is journalled in the head,the upper end of the pulley shaft being mounted in a ball bearing Il carried in an overhanging cantilever arm I8 formed in n tegral with the upper portion of the head. The

provide improved l! guard means of simple, neat and inexpensive conl ball bearing` I1 is held in place by a cover plate I9 secured tothe arm. .A stepped pulley 20 is ysecured on the shaft I5 below the bearing I1.

An electric motor 2| is adjustably secured to the head cap II and has a vertical shaft 22 the upper end of which carries a stepped pulley 23. The pulleys and 23 are here shown to be of the grooved type and are kconnected by a V-belt 24 which` is shi'ftable to selected; pulley grooves to vary the speed of the spindle. The columnar supl0 port I2 is between the pulleys, and the belt passes on opposite sides of the support.

The drill press head is provided with any suitable means for advancing the spindle, here shown to include a cross shaft 25 carrying a hand lever l5 26. The lower end of the quill carries a collar 21 to Awhich is secured lan upstanding gage rod 28 provided with adjustable stop nuts 28 engageable with a forked stop abutment 30 formed on the head. l 20 The head is generally mounted on ,the columnar support with the spindle projecting downwardly, but in some instances the head is mounted in inverted position, as when it is used to form a Shaper. in various other positions by changing the position or anglevof the support I2'.

In order to protect the machine operator and nearby persons from injury. andralso to protect the mechanism, the belt drive for the drill press 30 is enclosed by guard means comprising a front end guard 3l and two side guards 32 and 33, the three guards forming a housing for the belt drive.

The front end guard 3I guards or houses the pulley 20 and is preferably4 a hollow casting open 35 at the rear and having a downturned ilange 34 at its bottom forming a rounded rearwardly opening recess. The flange 34 embraces the rounded upper front portion of the drill press head I0 and rests on a shoulder or ledge head. Screws 36 pass through the opposite side portions of the flange 34 and are tapped into the head. The upper portion of the guard 3| over- I8 of the head and has a counterbored opening 31 receiving-an attaching screw 38 45 i which is tapped into the bearing cover I9, as seen in Fig. 4.

The head III carries thereon at opposite sides of its upper portion a. pair of spaced, parallel, horizontal cross rods 39 which are secured in 50 place by set screws 4I), one of the rods being carried by the cap II of the head. The side guards 32 and 33, each of which is of channel-shaped cross-section, form rearward continuations of the front end guard 3l and in many instances 5 If desired, the head can also beplaced 25 35 formed on the 4o Each of the side guards 32 and 33 is here shown to have a front reenforcing flange 44 and two intermediate reenforcing ribs 45. Walls of the guards 32 and 33 extend under the pulleys and belt and have registering notches 46 forming a passage for the motor shaft 22.

When it becomes necessary to shift the belt 24 for changing the spindle speed, one of the side guards 32 and 33 is laterally removed after loosening its thumb screw 42, and

The drill press head is here shown to have one driving pulley and one driven pulley, ,but in some cases the head may be further provided with an l intermediate pulle art. y

What I claim as new and desire to secure by Letters Patent is:

1. The combination, with a spindle-carrying head having a belt drive thereon including drivas is well understood in'this ing and driven pulleys, of an end guard secured i to said head to house the driven pulley, and a pair of complementary opposed side guards of channel cross-section secured to said head to house the driving pulley and belt and extending to said end guard, each side guard extending over and under the belt, at least one of said side guards being movable laterally of said head for access to the drive, and said head and last-named side guard having interengageable parts for supporting and positioning said side guard.

2. 'I'he combination, with a spindle-carrying head having driving and driven pulleys and a belt connecting said pulleys, of supporting pro- The bottom cross rods secured jections on opposite sides of said head and extending transversely of the pulley axes, an end to said head to house the driven pulley, and a pair of complementary side guards detachably secured and laterally movable on said projections to house the driving pulley and belt and extending to said end guard, each side guard extending over and under the belt, and a longitudinal edge of each side guard extending along said head in close proximity thereto.

3. The combination, with a support and a spinistering recesses in their longitudinal edges to form an aperture for receiving therethrough said support, and means for detachably securing said side guards to said head.

4. The combination, with a spindle-carrying head having a belt drive, of guard means for said drive including a pair of opposed side guards of channel cross-section secured to said head, said head and side guards having interengageable parts for supporting said guards, and each side guard extending over and under the belt of means for detachably securing said side guard to said head.

5. The combination, with a head having a spindle with a belt drive and having lateral projections extending transversely of the spindle, of guard means for said drive including a side guard slidable on said projections for access to the drive,

6. The combination, with a head having a spindle with a belt drive, of a pair of parallel in said head and projecting laterally from opposite sides of said head and extending transversely of the spindle, guard means for said drive including a pair of opposed side guards slidable on said rods and independently movable 4therefrom laterally of said head for access to the drive, and means for detachably securing said guards on one of said rods, each side guard having upper and lower longitudinal edges, the upper longitudinal edges of the mounted opposed side guards being adjacent to each other, and the lower longitudinal edges thereof extending along said head in closewproximity thereto.

HERBERT E. TAUTZ. 

